Feature: 1. Using the newly upgraded Bluetooth-compatible 5.0 chip, data transmission is more stable, wireless coverage is wider, and low-power operation, more power-saving; 2. Allows you to listen to music wirelessly, connect your mobile phone to the car stereo, and play audio wirelessly; Support CVC call noise reduction technology, built-in power isolation module, separate noise current, clear call; 3. Allows your wired earphones and speakers with no Bluetooth-compatible function to realize wireless Bluetooth-compatible function; Support TF card playback, you can enjoy music without Bluetooth-compatible connection to your mobile phone. 4. The back clip makes it firm, does not fall off, convenient to carry. Automatically connect after booting. After the first pairing with the device, the device can automatically connect. 5. Large-capacity lithium battery, which can be fully charged in 30 minutes, built-in lithium-ion battery with 200mAh capacity with 20 hours of music time. Specification: Function: Provide wireless signal, TF card playback Bluetooth-compatible protocol: AVRCP/A2DP/HFP/HSP Output port: 3.5mm audio Signal to noise ratio: Greater than 90dB Charging time: 2 hours Battery type: rechargeable lithium ion battery Material: Plastic colour: black Package Contents: 1 x Bluetooth Audio Receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.